You can optimize your network and Teams performance as the task in this link: https://learn.microsoft.com/en-us/microsoftteams/prepare-network#network-optimization.
Besides, you can use Call Quality Dashboard to help you optimize your network by keeping a close eye on quality, reliability, and the user experience.
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.